Universal milling machine



FIG. 1 is a perspective view of a universal milling machine showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and

FIG. 6 is a top view thereof. 

The ornamental design for a universal milling machine, as shown and described. 